First synthesis of magnesacyclopentadienes from acetylenes by treatment with BuMgHlg in the presence of Zr complexes
摘要:
Treatment of internal acetylenes and allenes with BuMgHlg (Hlg = Cl, Br) in the presence of Cp2ZrCl2 selectively leads to the formation of substituted magnesacyclopenta-2,4-dienes and alkylideneiiiaonesacyclopentenes.
Dzhemilev reaction in the synthesis of five-membered sulfur and selenium heterocycles*
作者:V. A. D’yakonov、A. G. Ibragimov、L. M. Khalilov、A. A. Makarov、R. K. Timerkhanov、R. A. Tuktarova、O. A. Trapeznikova、L. F. Galimova
DOI:10.1007/s10593-009-0272-0
日期:2009.3
sulfur and seleniumheterocycles based on the consecutive cyclometallation of olefins, allenes, and acetylenes using alkyl and haloalkyl derivatives of Al and Mg in the presence of catalytic amounts of titanium and zirconium complexes to give the corresponding alumina- and magnesacarbocycles in situ, which, without further purification, were introduced into reaction with sulfur or selenium, leading to
Cyclomagnesation of cycloalkynes with the use of RMgR’ catalyzed by zirconium complexes
作者:V. A. D’yakonov、A. A. Makarov、U. M. Dzhemilev
DOI:10.1134/s1070428009110037
日期:2009.11
The intermolecular cyclomagnesation of cycloalkynes and joint cyclomagnesation of cycloalkynes and disubstituted acetylenes was carried out by treating with RMgR' (R, R' = Et, Bu, H1g) in the presence of Cp2ZrCl2 as a catalyst. As a result new unsaturated bi-and tricyclic organomagnesium compounds were obtained in high yields.